MapItemRenderer.java

package net.minecraft.client.gui;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import java.awt.image.BufferedImage;
import java.util.Iterator;
import net.minecraft.block.material.MapColor;
import net.minecraft.client.renderer.RenderEngine;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.settings.GameSettings;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.world.storage.MapCoord;
import net.minecraft.world.storage.MapData;
import org.lwjgl.opengl.GL11;

@SideOnly(Side.CLIENT)
public class MapItemRenderer
{
    private int[] intArray = new int[16384];
    private int bufferedImage;
    private GameSettings gameSettings;
    private FontRenderer fontRenderer;

    public MapItemRenderer(FontRenderer par1FontRenderer, GameSettings par2GameSettings, RenderEngine par3RenderEngine)
    {
        this.gameSettings = par2GameSettings;
        this.fontRenderer = par1FontRenderer;
        this.bufferedImage = par3RenderEngine.allocateAndSetupTexture(new BufferedImage(128, 128, 2));

        for (int i = 0; i < 16384; ++i)
        {
            this.intArray[i] = 0;
        }
    }

    public void renderMap(EntityPlayer par1EntityPlayer, RenderEngine par2RenderEngine, MapData par3MapData)
    {
        for (int i = 0; i < 16384; ++i)
        {
            byte b0 = par3MapData.colors[i];

            if (b0 / 4 == 0)
            {
                this.intArray[i] = (i + i / 128 & 1) * 8 + 16 << 24;
            }
            else
            {
                int j = MapColor.mapColorArray[b0 / 4].colorValue;
                int k = b0 & 3;
                short short1 = 220;

                if (k == 2)
                {
                    short1 = 255;
                }

                if (k == 0)
                {
                    short1 = 180;
                }

                int l = (j >> 16 & 255) * short1 / 255;
                int i1 = (j >> 8 & 255) * short1 / 255;
                int j1 = (j & 255) * short1 / 255;

                if (this.gameSettings.anaglyph)
                {
                    int k1 = (l * 30 + i1 * 59 + j1 * 11) / 100;
                    int l1 = (l * 30 + i1 * 70) / 100;
                    int i2 = (l * 30 + j1 * 70) / 100;
                    l = k1;
                    i1 = l1;
                    j1 = i2;
                }

                this.intArray[i] = -16777216 | l << 16 | i1 << 8 | j1;
            }
        }

        par2RenderEngine.createTextureFromBytes(this.intArray, 128, 128, this.bufferedImage);
        byte b1 = 0;
        byte b2 = 0;
        Tessellator tessellator = Tessellator.instance;
        float f = 0.0F;
        GL11.glBindTexture(GL11.GL_TEXTURE_2D, this.bufferedImage);
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_ONE, GL11.GL_ONE_MINUS_SRC_ALPHA);
        GL11.glDisable(GL11.GL_ALPHA_TEST);
        tessellator.startDrawingQuads();
        tessellator.addVertexWithUV((double)((float)(b1 + 0) + f), (double)((float)(b2 + 128) - f), -0.009999999776482582D, 0.0D, 1.0D);
        tessellator.addVertexWithUV((double)((float)(b1 + 128) - f), (double)((float)(b2 + 128) - f), -0.009999999776482582D, 1.0D, 1.0D);
        tessellator.addVertexWithUV((double)((float)(b1 + 128) - f), (double)((float)(b2 + 0) + f), -0.009999999776482582D, 1.0D, 0.0D);
        tessellator.addVertexWithUV((double)((float)(b1 + 0) + f), (double)((float)(b2 + 0) + f), -0.009999999776482582D, 0.0D, 0.0D);
        tessellator.draw();
        GL11.glEnable(GL11.GL_ALPHA_TEST);
        GL11.glDisable(GL11.GL_BLEND);
        par2RenderEngine.resetBoundTexture();
        par2RenderEngine.bindTexture("/misc/mapicons.png");
        int j2 = 0;

        for (Iterator iterator = par3MapData.playersVisibleOnMap.values().iterator(); iterator.hasNext(); ++j2)
        {
            MapCoord mapcoord = (MapCoord)iterator.next();
            GL11.glPushMatrix();
            GL11.glTranslatef((float)b1 + (float)mapcoord.centerX / 2.0F + 64.0F, (float)b2 + (float)mapcoord.centerZ / 2.0F + 64.0F, -0.02F);
            GL11.glRotatef((float)(mapcoord.iconRotation * 360) / 16.0F, 0.0F, 0.0F, 1.0F);
            GL11.glScalef(4.0F, 4.0F, 3.0F);
            GL11.glTranslatef(-0.125F, 0.125F, 0.0F);
            float f1 = (float)(mapcoord.iconSize % 4 + 0) / 4.0F;
            float f2 = (float)(mapcoord.iconSize / 4 + 0) / 4.0F;
            float f3 = (float)(mapcoord.iconSize % 4 + 1) / 4.0F;
            float f4 = (float)(mapcoord.iconSize / 4 + 1) / 4.0F;
            tessellator.startDrawingQuads();
            tessellator.addVertexWithUV(-1.0D, 1.0D, (double)((float)j2 * 0.001F), (double)f1, (double)f2);
            tessellator.addVertexWithUV(1.0D, 1.0D, (double)((float)j2 * 0.001F), (double)f3, (double)f2);
            tessellator.addVertexWithUV(1.0D, -1.0D, (double)((float)j2 * 0.001F), (double)f3, (double)f4);
            tessellator.addVertexWithUV(-1.0D, -1.0D, (double)((float)j2 * 0.001F), (double)f1, (double)f4);
            tessellator.draw();
            GL11.glPopMatrix();
        }

        GL11.glPushMatrix();
        GL11.glTranslatef(0.0F, 0.0F, -0.04F);
        GL11.glScalef(1.0F, 1.0F, 1.0F);
        GL11.glPopMatrix();
    }
}